I have the CETME, and have found it an excellent shooter, great value for the money. For a hundred or so bucks more, the HK G3 is a good gun, but functionally little different from the original CETME.
Using a scope and good ammo, mine gets 1.5 MOA on the average, 1.0 MOA on a good day.
With no gas system, these rifles are cleaner running and more forgiving of ammo variations than gas-operated guns. Recoil seems lighter too.
Unfortunately, Century has come to the end of their kits, and the CETME rifles will become scarcer. Get one before the price skyrockets!